Ceramic Doctor

Evidence-backed design review for Ceramic and ordinary websites. Runs through a CLI, an MCP server, or the bundled agent skill. It combines the existing Ceramic Doctor with desktop/mobile browser QA, optional visual judgement, actionable findings and repeatable fix verification.

Ceramic Doctor is independently runnable. It does not require Rams or Rams credits.

Install from GitHub

Node.js 20+ is required. The initial distribution is GitHub; no npm publication is assumed.

npm install -g github:The-Utopia-Studio/ceramic-doctor#v0.1.0
ceramic-doctor install-browser
ceramic-doctor review http://localhost:4173 --ready main

Or clone and run locally:

git clone https://github.com/The-Utopia-Studio/ceramic-doctor.git
cd ceramic-doctor
npm ci
node bin/ceramic-doctor.mjs install-browser
node bin/ceramic-doctor.mjs review https://example.com --ready main --json

For a one-off invocation:

npx --yes --package=github:The-Utopia-Studio/ceramic-doctor#v0.1.0 ceramic-doctor doctor

Browser installation is one-time per Playwright version. On Linux, use npx playwright install --with-deps chromium from the cloned repository when system libraries are missing.

Related MCP server: fovea-web

Connect over MCP

After global installation, add this server to your MCP client. Choose the project root where reports should be saved. The server runs locally over stdio; there is no public hosted HTTP endpoint.

{
  "mcpServers": {
    "ceramic-doctor": {
      "command": "ceramic-doctor",
      "args": ["mcp", "--project", "/absolute/path/to/your-project"]
    }
  }
}

An npx configuration can run without a global CLI install. The initial GitHub dependency install can exceed MCP clients' startup timeout; preinstall the CLI as above for reliable startup, or increase your client's startup timeout before using this alternative:

{
  "mcpServers": {
    "ceramic-doctor": {
      "command": "npx",
      "args": ["--yes", "--package=github:The-Utopia-Studio/ceramic-doctor#v0.1.0", "ceramic-doctor", "mcp", "--project", "/absolute/path/to/your-project"]
    }
  }
}

For Codex CLI after global installation:

codex mcp add ceramic-doctor -- ceramic-doctor mcp --project /absolute/path/to/your-project

Example request: “Use Ceramic Doctor to review http://localhost:4173. Wait for main, inspect mobile and desktop, propose fixes, then verify them.”

Tool input for visual review:

{
  "url": "http://localhost:4173",
  "readySelector": "main",
  "visual": "codex"
}

The default run uses no model. visual: "codex" runs the installed, signed-in Codex CLI on captured screenshots, consuming its allowance. It returns model suggestions separately from measured failures. Model errors preserve browser evidence and produce a partial run. Missing login is never reported as a successful visual review.

Use the skill

ceramic-doctor install-skill

This installs skills/ceramic-doctor into your Codex skills directory without overwriting an existing skill. Reopen your agent session and invoke $ceramic-doctor. Other agents can use the same skills/ceramic-doctor/SKILL.md directly, or copy the folder to their supported skill directory.

Review and verify

ceramic-doctor doctor --project /path/to/Ceramic-Design-System
ceramic-doctor review http://localhost:4173 --ready main --visual codex --json
ceramic-doctor list
ceramic-doctor report REVIEW_ID --json
# Apply the proposed source changes in your editor/agent, then:
ceramic-doctor verify REVIEW_ID --json

doctor reuses repositoryDoctor() from Ceramic's CLI. In the Ceramic source repository it loads the local implementation; elsewhere it validates the installed Ceramic library. The report names this scope explicitly. Library health is not proof that the target application follows every Ceramic contract.

With --project /path/to/Ceramic-Design-System --qa browser, a review also invokes the existing .agents/skills/design-system-ux-qa/scripts/run-qa.mjs browser --json. The runner's real Playwright assertions/output are retained. --qa quick and --qa contracts reuse those gates. These options execute the selected project's trusted QA code, may run a large suite, and have a five-minute process budget. A missing or timed-out gate is blocked. No snapshots are updated.

Generic URL inspection adapts the existing Ceramic AI-user-testing observation and browser-QA evidence pattern: fresh sessions, rendered geometry, visible controls, keyboard samples and explicit assertion steps. It adds axe-core WCAG rules and structured findings.

Reports are stored privately under <project>/.ceramic/design-reviews/<uuid>/:

• report.json: machine-readable scope, verdict, findings, score, coverage, QA output and verification.

• report.md: readable findings, fix proposals and coverage.

• <scenario>-desktop.png, <scenario>-mobile.png: actual viewport captures.

• Matching JSON: DOM observations, focus samples, failed requests and exact runtime state.

Add .ceramic/design-reviews/ to the target project's .gitignore. Screenshots and page text can contain project data. Nothing is uploaded by the default run; opt-in visual review sends screenshots/text through Codex. Do not share evidence containing secrets or private data unintentionally.

Interaction and state coverage

For hydrated apps, supply a visible readiness selector. Without one, only the initial visible body is guaranteed. Captures are viewport screenshots; the model does not inspect content below the captured area.

Save review-plan.json:

{
  "readySelector": "main",
  "scenarios": [
    { "id": "ready", "actions": [] },
    {
      "id": "menu-open",
      "actions": [
        { "kind": "click", "selector": "[data-slot='menu-trigger']" },
        { "kind": "expectVisible", "selector": "[role='menu']" }
      ]
    },
    { "id": "rtl-probe", "direction": "rtl", "reducedMotion": "reduce", "actions": [] }
  ]
}

ceramic-doctor review http://localhost:4173 --plan review-plan.json --json

MCP accepts the same scenarios array. Up to eight scenarios × two viewports, twenty actions each. Supported actions: click, press, fill, select, expectVisible, expectText. expectText uses a CSS selector. Actions should exercise an authorized test environment; unlike passive review, a supplied click/fill/key can change application state. Each scenario has a fresh context. Optional url must share the review origin; locale sets browser locale, while direction forces document direction and is explicitly marked as a probe. Native localization, loading, empty/error states, modes and themes need explicit routes/actions/assertions.

Results and limits

Execution and product verdict are independent: a completed review can return FAIL because it successfully found defects. Browser/model/QA execution failures remain visible as partial runs. CLI exit codes: 0 completed without blockers, 1 blockers or failed Doctor contracts, 2 blocked/partial execution or invalid input.

The deterministic ceramic-technical-v1 index starts at 100 and subtracts 25/10/3/1 for unique critical/serious/moderate/minor automated findings. A critical caps the value at 59. Same rule, scenario and selector across viewports counts once. Model suggestions never affect this score; incomplete automated execution gives null. This is a technical defect index, not calibrated visual taste, accessibility certification or release approval.

Verification preserves the original report, reruns the same URL/readiness/scenarios/viewports, and checks every originally affected viewport. A finding is fixed only when its deterministic rule completed without that finding. axe checks requiring manual review remain incomplete. An absent model suggestion stays unverified. Browser errors, timeouts and skipped checks cannot erase defects.

Source repair is handled by the host agent/editor, using the proposed smallest fix under existing project contracts. This release does not apply model-generated patches, authenticate into sites, run a full screen-reader audit, cover every browser/theme/state, or claim Rams quality parity. The visual reviewer and deterministic engine are replaceable modules.

Development

npm ci --ignore-scripts
npx playwright install chromium
npm run check
npm test
npm pack --dry-run

Tests exercise real Chromium defects, same-scope fix verification, unavailable coverage, MCP initialization/calls/inline images with the official SDK, model-output validation and skill installation. Codex calls are opt-in and excluded from CI.

한국어

Ceramic Doctor를 CLI·MCP·스킬로 사용할 수 있습니다. 기본 실행은 기존 Doctor와 브라우저 접근성·모바일 넘침·런타임 오류를 검사합니다. --visual codex는 실제 스크린샷의 디자인 판단을 추가합니다. 수정 제안은 보고서에 남기고, 에이전트가 수정한 뒤 verify/verify_fixes로 동일 조건을 다시 검증합니다. GitHub 설치와 MCP 설정은 위 예시를 사용하세요.